I just bought a GH&S Banjo Mandolin at an auction and would like to restore it, but would love to understand if it has any value before I do. It's a really neat little instrument, 4 string "Melody-Uke", I assuem a Banjulele? Need's new velum for sure, but other than that, I'm in love with, but will probably give it as a gift. Any thoughts on value before I go spending a ton of $$ on it